General :: How To Make Own File Extension And Program For Running That

I have a big project about Android. So you know noobs can't use ADB and Fastboot well. I'll make a custom file extension. That is an script. That will be a custom script. So how can I make my own scripting language ? And how can I export a file format from scripting language ? For example; Perl' s file format is .pl and Shell' s is .sh and so on...

Imagine I made an scripting language. But how can I make a program for running that ?

Go on, my idea is; user will install executer program. And he/she can run special scripts with that. So rooting, bootloader unlocking will be pretty easy with that. What do you think ?

My scripting language's scripts will be like this:

[ADB] reboot; ( Calls adb reboot command )
[FASTBOOT] oem unlock;

And here is a rooting script in my mind:

[FASTBOOT] oem unlock;
[FLASH R] [FILENAME:twrp.img];
[MESSAGE] Put your device to sideload mode.;
[SIDELOAD] [FILENAME:root.zip]
[ADB] reboot;

So can use ADB and Fastboot commands without using CMD. .When user openes .myscript file with notepad, he/she will see that codes.